Deadlock



FIG. 1 is a perspective view of a deadlock showing our new design;

FIG. 2 is a plan view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is an other side view thereof; and,

FIG. 6 is an underside view thereof. 

The ornamental design for a deadlock, as shown. 